Question about 2004 Volvo S60

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I have volvo s60 2004.i was driving my car when suddenly front panel switched off and the engine also switched off.i tryed to start engine but nothing was working not panels not lights nothing, just radio and cd.now my car is standing at a volvo service and they are saying that CEM central electronic module needs to be changed.the battery is also working. Can CEM be a reason ??? they say that it is the first time they see the vehicle in this conditon and they are not sure if its the CEM system.also the car cant be connected with computer because nothing is working. please tell me ur opinion . thank you very much

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Could be the CEM which is the main computer in the whole car. or it could be a communication fault in the CAN network

Posted on Jul 04, 2010

  • reader312 Jun 19, 2011

    Hi there!! i also have a volvo s60 d5 with the same problem!! the car just stopped and there was no engine management light on on the dash, we got the car started again but it just stops after a few minutes! if the engine management light shows when you turn the ignition on then the car will start but if its not then it wont!! we've had the diagnosis guy out to it with his laptop and the car ran for 35 minutes then stopped again and he lost all communication with the car! after 10 minutes the light on the dash came on an he was able to talk to it again and the laptop said that the ECU lost communication with the CEM unit. We got the ECU sent away, tested and even changed but the car is still the same!!!! We just need to know too if it is the CEM unit because £800 is alot to spend if its not that!!! So it looks like we've both got the same problem!! we'll keep intouch!! Michael

  • Brian Tembo Nov 16, 2011

    Hi! We seem to have similar problem. For me my Volvo s80 2.0T shows break light then ABS and gives thud like I have been hit from the back. I hear some relay clicks under the dash and the DIM goes dead. Headlamps turn on and when stop and switch off the car it will not start till I remove a battery terminal. I took car to dealer each time this has happened and he has tried everything including reinstall the network software, ABS module and the CEM. Only once we saw a CEM internal error. The SRS Light and engine service messages comeup when this happens. A few days ago when this happened I took car to dealer and their computer could not communicate with the car until a reset was done by removing battery terminal. Dealer says it is the CEM which needs replacement. IS there part number for the CEM? I know it is expensive but I have no choice want to try it out then I will report!

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